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Chapter 6 Replacement of CPU/Memory Board Unit (CMU), CPU Module, and DIMM 6-17
Caution – After stopping all the domains, be sure to switch off the main line switches in
the power supply system to completely shut off the supply of power.
6. Connect the clip of the antistatic wrist strap and of the antistatic mat to the server
grounding port. (See Section 1.4, “Antistatic Precautions” on page 1-9)
7. Ensure that the metallic underside of the wrist strap is in direct contact with your
skin.
The wrist strap should be snug around the wrist so that it does not rotate. (See Section 1.4,
“Antistatic Precautions” on page 1-9)
Caution – Before handling FRUs, be sure to connect the clip of the antistatic wrist strap
and of the antistatic mat to the server grounding port, and attach the band of the wrist strap
to one of your wrists. Place the FRUs on the grounded antistatic mat. Failure to take these
antistatic measures might result in serious damage.
8. Remove the CMU to be replaced. (See
FIGURE 6-5 or FIGURE 6-6)
a. Using a Phillips screwdriver, turn the knob screws securing the upper and lower
eject/lock levers 90 to 180 degrees to unlock the levers. (Turn the knob screw
while lightly pulling the lever by one hand.)
b. Unlock the eject/lock levers to pull the CMU off the backplane.
c. While grasping the handle at the front of the CMU, pull out the CMU partially
until the [NEAR TO END] label comes into view, and then stop pulling.
d. Raise the handle at the upper part of the CMU.
e. While grasping the front and upper handles of the CMU, pull it out slowly from
the slot.
Note – To upgrade the CMU, remove the dummy (filler) unit before mounting the CMU to
be added. Since the same levers are used on the dummy (filler) unit, please operate the
eject/lock levers in the same manner.
Caution – A CMU with mounted components in the maximum configuration weighs about
22 kg.
9. Place the removed CMU with the cover facing upward on an antistatic mat.